SC US (TTGP), LTD. - 20 Feb 2025 SCHEDULE 13D/A Report for Amplitude, Inc. Class A Common Stock, par value $0.00001 per share (AMPL)

Filing manager
SC US (TTGP), LTD.
Reporting owner
SC US (TTGP), LTD. ("SC US (TTGP)")
Security
Amplitude, Inc. Class A Common Stock, par value $0.00001 per share
Beneficially owned shares
10,223,342 shares
Ownership signal CIK-linked ownership evidence from parsed SEC filings. 2 signals
Large-stake signal

Form

SCHEDULE 13D/A

Active or control-oriented beneficial ownership filing.

Ownership

9.9%

Beneficial ownership of this reported class.

Shares

10,223,342 shares

Shares beneficially owned as disclosed.

Event date

20 Feb 2025

Date tied to the ownership event or amendment.

Accepted by SEC

25 Feb 2025

EDGAR acceptance date.

How to read this large-stake filing
  • Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
  • Compare this filing with the holder history and issuer page before treating the percentage as a current position.
  • Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership
9.9%
Subject security Names, identifiers, and filing context for this profile. 2 source fields
Symbol
AMPL
Shares outstanding
103,266,081 shares
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
SCHEDULE 13D/A
Accepted by SEC
25 Feb 2025, 21:23:57 UTC
Event date
20 Feb 2025
Source filing
View source filing

Key filing fact

SC US (TTGP), LTD. disclosed 9.9% ownership in Amplitude, Inc. Class A Common Stock, par value $0.00001 per share (AMPL) on 20 Feb 2025.

Key facts

  • SC US (TTGP), LTD. filed SCHEDULE 13D/A for Amplitude, Inc. Class A Common Stock, par value $0.00001 per share (AMPL).
  • Disclosed ownership: 9.9%.
  • Date of event: 20 Feb 2025.

Change

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 25 Feb 2025, 21:23.

Research use

  • This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
  • Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

View source filing

Reporting persons

Disclosed reporting parties (13)

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name Ownership Shares owned Sole voting power Shared voting power Signature Title CIK
SEQUOIA CAPITAL GLOBAL GROWTH FUND III - ENDURANCE PARTNERS, L.P. ("SC GGF III") 2.6% 2,554,932 0 2,554,932 Roelof Botha Roelof Botha, Director
SEQUOIA CAPITAL U.S. GROWTH FUND VIII, L.P. ("SEQUOIA CAPITAL U.S. GROWTH FUND VIII") 4.8% 4,869,459 0 4,869,459 Roelof Botha Roelof Botha, Director
SEQUOIA CAPITAL U.S. VENTURE 2010 -SEED FUND, L.P. ("USV 2010 -SEED") 0.2% 235,201 0 235,201 Roelof Botha Roelof Botha, Director
SEQUOIA CAPITAL U.S. GROWTH FUND IX, L.P. ("SEQUOIA CAPITAL U.S. GROWTH FUND IX") 2.3% 2,225,077 0 2,225,077 Roelof Botha Roelof Botha, Director
SEQUOIA CAPITAL U.S. GROWTH PARTNERS FUND IX, L.P. ("SEQUOIA CAPITAL U.S. GROWTH PARTNERS FUND IX") 0.1% 95,885 0 95,885 Roelof Botha Roelof Botha, Director
SEQUOIA CAPITAL U.S. GROWTH IX PRINCIPALS FUND, L.P. ("SEQUOIA CAPITAL U.S. GROWTH IX PRINCIPALS FUND") 0.3% 242,788 0 242,788 Roelof Botha Roelof Botha, Director
SCGGF III -ENDURANCE PARTNERS MANAGEMENT, L.P. ("SCGGF III-ENDURANCE PARTNERS MANAGEMENT") 2.6% 2,554,932 0 2,554,932 Roelof Botha Roelof Botha, Director
SC U.S. GROWTH VIII MANAGEMENT, L.P. ("SC U.S. GROWTH VIII MANAGEMENT") 4.8% 4,869,459 0 4,869,459 Roelof Botha Roelof Botha, Director
SC U.S. VENTURE 2010 MANAGEMENT, L.P. ("USV 2010 MANAGEMENT") 0.2% 235,201 0 235,201 Roelof Botha Roelof Botha, Director
SC U.S. GROWTH IX MANAGEMENT, L.P. ("SC U.S. GROWTH IX MANAGEMENT") 2.7% 2,563,750 0 2,563,750 Roelof Botha Roelof Botha, Director
SC US (TTGP), LTD. ("SC US (TTGP)") 9.9% 10,223,342 0 10,223,342 Roelof Botha Roelof Botha, Director 0001607841
DOUGLAS LEONE ("DL") 2.6% 2,554,932 0 2,554,932 Douglas Leone Douglas Leone
ROELOF BOTHA ("RB") 2.6% 2,554,932 0 2,554,932 Roelof Botha Roelof Botha
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